具有延长血清半衰期的Fc工程B7-H3抗体,用于增强癌症治疗
Huiting Wu1,2,3, Mengjia Zhang1,3, Tingting Wang1,3
1Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou 450001, China.
Molecular pharmaceutics
|October 31, 2025
概括
研究人员设计了一种抗B7-H3抗体,以延长其血清半衰期,提高其治疗食道状细胞癌和其他表达B7-H3的癌症的潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物技术是生物技术.
背景情况:
- 单克隆抗体为癌症提供了新的治疗选择.
- 由于其瘤特异性表达,B7-H3是一个有前途的治疗标.
- 提高抗体血清半衰期对于有效的癌症治疗至关重要.
研究的目的:
- 开发一种人性化的抗B7-H3抗体,具有改善的药理动力学特性.
- 为了改造抗B7-H3抗体的Fc区域,以提高血清半衰期.
- 在临床前癌症模型中评估工程抗体的疗效.
主要方法:
- 使用小鼠免疫和菌体显示,开发了一种高亲和度的人性化抗B7-H3抗体.
- 通过M428L和N434S替代来改造抗体的Fc片段,以改善新生儿Fc受体 (FcRn) 的结合.
- 在人类FcRn转基因小鼠中评估了抗体亲和力,对食道状细胞癌 (ESCC) 细胞的细胞毒性,以及体内半衰期和抗瘤活性.
主要成果:
- 改造的抗体A172-Hu3-LS表现出FcRn结合的改善,并保持了细胞毒性.
- 这种Fc优化的抗体在体内半衰期延长了7.9天.
- 在临床前模型中观察到强烈的抗瘤活性.
结论:
- 通过M428L和N434S替代的Fc工程有效地延长治疗抗体的半衰期.
- 这种策略增强了药理动力学特性,从而提高了抗瘤功效.
- 这种方法有可能优化其他治疗抗体,用于各种表达B7-H3的癌症.
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